It sounds like most of the recent activity has been offshore in 70+fow and out.
Personally, if this is a new boat and first time for awhile, might just try in close on your first trip and get
acquainted with your boat. Offshore isn't a place to find nuances on your first trip. There very well may be some skamania roaming around right now closer to shore.
The South End provides useful resources and discussion forums for those that fish The South End of Lake Michigan for Salmon, Steelhead, Perch, and Bass as well as elsewhere in the Region and Chicago area.